City of Boulder Drinking Water Quality Program
Boulder Creek Watershed
Fecal Coliform Time Series for 2001
Middle Boulder Creek @ Nederland WTP

Preliminary Data - subject to revision

Marker Indicates no data available
Marker Indicates data exceeds plot scale.

Information on Fecal Coliform:

Fecal Coliform Bacteria is found in the intestinal tracts of mammals. High concentrations of the bacteria in water or sludge suggest the presence of disease-causing organisms, and may be caused by septic tank failure, poor pasture and animal keeping practices, pet waste, and urban runoff.

To measure fecal coliform bacteria, water samples are collected in sterilized containers, filtered, and incubated at a certain temperature. The resulting bacterial colonies that form are counted and recorded as the number of colony producing units per 100 ml of water (CPU/100 ml). Safe drinking water should have fecal coliform counts of 0 CPU/100 ml. For safe swimming, concentrations less than 200 CPU/100 ml is desirable, and for boating, less than 1000 CPU/100 ml is desirable. However, these standards may vary at the local, state, and federal level.

More general information about Fecal Coliform
Measurement of Fecal Coliform
Factors affecting Fecal Coliform
Standards regarding Fecal Coliform
Interpretation of Boulder Creek Fecal Coliform data
Data Source: City of Boulder Water Quality Monitoring
Point of Contact: Chris Rudkin
Collection and Analysis notes
Analysis method: SM 9222D

Monitoring site information:
  • Location: Middle Boulder Creek @ Nederland WTP
  • Name: MBC-WTP
  • Type: Composite
  • Frequency: Monthly
  • Longitude: 105 ° W 31'
  • Latitude: 39 ° N 57'
  • Elevation: 8400 feet asl
  • Site photo
Downstream Site: North Boulder Creek at Boulder Falls

Plot Label Date FColi
#/100 mL
01 January, 2001 No Data
02 February, 2001 < 1*
03 March, 2001 1*
04 April, 2001 14*
05 May, 2001 < 1*
06 June, 2001 1*
07 July, 2001 8*
08 August, 2001 1*
09 September, 2001 2*
10 October, 2001 < 1*
11 November, 2001 < 1*
12 December, 2001 No Data
*value below detection limit:
Detection Limit (if available) 20.0

Preliminary Data - subject to revision

Select on the parameter name to view all Fecal Coliform time series plots on the basin map. Select on the table date to view stream Fecal Coliform profiles observed on that date. Select here to view all parameters at this site.

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Return to the BASIN environmental data catalog

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